Answer :
The statement is false because public key certificates are signed by the CA's private key, not encrypted with the CA's public key. The CA's digital signature on the certificate is verified using the CA's public key.
- Public key certificates are used to validate the ownership of public keys, and they contain information about the public key, the entity to whom it belongs, and the digital signature of the certificate authority (CA).
- The key point is that the certificate itself is signed by the CA's private key, and not encrypted with the CA's public key.
- Instead, it is the CA's digital signature that is verified using the CA's public key. When a user receives a certificate, they use the CA's public key to verify the signature, ensuring the authenticity and integrity of the certificate.
Therefore, The statement "Typically, the entire certificate would be encrypted with certifier.com's public key" is False.
The statement "Suppose certifier.com creates a certificate for foo.com. Typically, the entire certificate would be encrypted with certifier.com's public key." is false because the certificate is not encrypted with certifier.com's public key, instead, it is digitally signed using the certifier.com's private key for authentication and integrity verification.
When certifier.com creates a certificate for foo.com, the certificate is not typically encrypted with certifier.com's public key. Instead, it is digitally signed using certifier.com's private key. The digital signature serves as proof of the certificate's authenticity and integrity.
The digital signing process involves applying a cryptographic algorithm to a hash value of the certificate data using the private key. This generates a unique digital signature. The certificate, along with the digital signature, is then made publicly available.
Upon receiving the certificate, users can use certifier.com's public key, which is widely distributed and trusted, to verify the digital signature. This ensures that the certificate was issued by certifier.com and has not been tampered with.
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